ToolsGround OST to PST Converter is the best way for people to convert an OST file to a PST file. It lets you change lost or damaged OST files without losing any data. You can change from OST to PST without installing Outlook with this app. It can send more than one OST file at the same time. It keeps the purity of the data and the order of the folders while the conversion is happening. Also, you can get the trial version for free and export the first 10 things in each folder.